In this letter, we propose a low complexity linear precoding scheme for downlink multiuser MIMO systems where there is no limit on the number of multiple antennas employed at both base station and users. proposed algorithm, can achieve precoder in two steps. first step, balance interference (MUI) noise by carrying out novel channel extension approach. second further optimize system performance assuming parallel SU channels. Simulation results show that algorithm elaborate while offering...

In this paper, based on a bidirectional parallel multi-branch feature pyramid network (BPMFPN), novel one-stage object detector called BPMFPN Det is proposed for real-time detection of ground multi-scale targets by swarm unmanned aerial vehicles (UAVs). First, the convolution modules are used to construct enhance expression abilities different scale layers. Next, integrated into single-stage framework ensure performance. order validate effectiveness algorithm, experiments conducted four...

Massive multiple-input and multiple-output (MIMO) system has shown its outstanding performance in energy saving spectrum efficiency, with channel state information (CSI) available at base-station (BS) side for downlink beam-forming [1]. Further study revealed that of massive-MIMO will be limited by so-called pilot contamination multi-cell scenario [2], where the transmit CSI one BS is a superposition coefficient serving user coefficients users adjacent cells using same pilot, which...

Ultra dense networks are a promising technology enabling high power and spectrum efficiencies in future wireless systems. It is well-known that for ultra inter-cell interference one of the main bottlenecks prohibiting achieving promised performance gains. In order to effectively coordinate or mitigate paper, we propose graph-based low complexity dynamic clustering algorithm. The key idea behind proposed algorithm dividing whole network into number clusters under size constraint maximum...

Ultra dense network (UDN) is a promising technology enabling high power and spectrum efficiencies for future wireless systems such as 5th generation (5G) networks. Regarding the importance of UDN, in this paper we investigate performance small cell networks with different base station (SBS) densities via using system-level simulation platform some real traffic data provided by China Mobile Research Institute. We first build practical distribution model SBSs then construct deployment...

Massive multiple-input and multiple-output (MIMO) systems have draw a lot of attention, due to its outstanding performance in energy saving spectrum efficiency [1]. In massive MIMO systems, the intra-cell interference, uncorrelated noise fast fading nearly vanish. Further study reveals that for multi-cell will be limited by so-called pilot contamination (inter-cell interference) [2], where transmitted CSI at one BS includes channel coefficients from all users using same pilot. However,...

Mobile Internet and of Thing (IoT) have been widely recognized as the two major driven forces next generation mobile systems (IMT-2020 or 5G). Key performance indicators (KPI) 5G are identified to satisfy needs these applications, such 10Gbps peak data 1000× capacity increase. A common census has reached in industry that high frequency ultra dense small cell (5G cell) is expected for some critical KPIs. In this paper, perspectives on presented, mainly focusing new waveform design thoughts...

This paper focuses on transmit precoding for multiuser MIMO downlink systems. In systems, interference (MUI) and noise are two well-known factors with respect to the system's performance. Block diagonalization (BD) method is proposed completely eliminate MUI by placing intended users in nullspace of all unintended users. But BD imposes a condition relation between number receive antennas. addition, causes enhancement due not considering noise's influence. Thus, at low medium signal-to-noise...

In this paper, we evaluate the existing transmission schemes in multi-cell environment, such as single-cell with Inter-cell interference (ICI) well Collaborative Multi-Point transmission/reception (CoMP) technique LTE-A, and propose an more effective solution to deal inter-cell interference. The proposed structure takes advantage of cooperation between base stations (BS), combines both closed-loop open-loop techniques. With concept Effective Channel, classic Space Frequency Block Coding...

With the large-scale integration of distributed photovoltaic (DPV) power plants, uncertainty generation is intensively influencing secure operation systems. Improving forecast capability DPV plants has become an urgent problem to solve. However, most are not able make on their own due constraints investment cost, data storage condition, and influence microscope environment. Therefore, this paper proposes a master-slave method predict target without ability based with comprehensive system...

Small cell networks have been recognized as a promising technology to realize high spectrum and energy efficiency communications in future wireless networks. However, the capacity of small is limited by interference among links communicating simultaneously. Efficient resource allocation effective management definitely imperative for cells. In this paper, we propose an algorithm optimize power subcarrier jointly order maximize weighted sum rate dense Facing with large amount cells,...

Mobile Internet and of Thing (IoT) have been widely recognized as the two major driven forces next generation mobile systems (IMT-2020 or 5G). Key performance indicators (KPI) 5G are identified to satisfy needs these applications. It is analyzed that a new waveform design with large bandwidth at high frequency for small cell expected some critical KPIs. In this paper, perspectives on presented. Specifically, principles transmission time interval (TTI), system bandwidth, subcarrier spacing,...

Large language models reveal deep comprehension and fluent generation in the field of multi-modality. Although significant advancements have been achieved audio multi-modality, existing methods are rarely leverage model for sound event detection (SED). In this work, we propose an end-to-end framework understanding features while simultaneously generating their temporal location. Specifically, employ pretrained acoustic to capture discriminative across different categories autoregressive text...

In this paper, a novel Ultra-Wideband and High-Frequency (UWHF) channel modeling is proposed for the next generation wireless communications e.g., 5G. The based on (UWB) model measurement results at high-frequency (28GHz 73GHz) in real scenarios. specific, method aims accurately describing characteristics of UWHF channels, which can be exploited to realize high speed communications. simulation are given verify some important characteristics, such as time varying, selectivity both frequency...

In this paper, we investigate the multiple-input multiple-output (MIMO) transceiver design under an interesting power model named mixed constraints. considered model, several antenna subsets are constrained by sum constraints while other antennas subject to per-antenna This kind of designs includes both constraint and as its special cases. is critical importance for distributed systems (DASs) with heterogeneous remote radio heads (RRHs) such cloud access networks (C-RANs). our work, try...

This letter reveals that whole link reciprocity does not exist in general amplify-and-forward (AF) time division duplex (TDD) relay systems due to the gain matrix. To resolve this problem, a novel matrix design method is proposed. Any existing criterion can be adopted downlink (uplink) ensure optimal performance, and proposed scheme used uplink (downlink), with small adjustment, keep reciprocity. Simulation results show that, maintain without performance loss.

In cooperative MIMO relay systems, when amplify-and-forward (AF) mode is used, the equivalent channel from source station (SS) to destination (DS) can be seen as a simple channel. When singular value decomposition (SVD) based precoding used in system, decomposed into several parallel non-interfering subchannels. It showed that some of values subchannels very small and performance whole system limited by with lower gains. Thus it important decide how many should maximize performance. this...